text:
|Publication number
|Publication type
|Application number
|Publication date
|Sep 20, 2005
|Filing date
|Mar 26, 2002
|Priority date
|Mar 26, 2002
|Fee status
|Also published as
|Publication number
|Clark Lubbers, Susan Elkington, Randy Hess, Stephen J. Sicola, James McCarty, Anuja Korgaonkar, Jason Leveille
|Original Assignee
|Hewlett-Packard Development Company, L.P.
|Export Citation
|BiBTeX, EndNote, RefMan
|Patent Citations (26), Non-Patent Citations (17), Referenced by (73), Classifications (29), Legal Events (4)
|External Links: USPTO, USPTO Assignment, Espacenet
The present invention relates generally to error recovery in data storage systems, and more specifically, to a system for providing controller-based remote data replication using a redundantly configured Fibre Channel Storage Area Network to support data recovery after an error event and enhance data distribution and migration.
Recent years have seen a proliferation of computers and storage subsystems. Demand for storage capacity grows by over seventy-five percent each year. Early computer systems relied heavily on direct-attached storage (DAS) consisting of one or more disk drives coupled to a system bus. More recently, network-attached storage (NAS) and storage area network (SAN) technology are used to provide storage with greater capacity, higher reliability, and higher availability. The present invention is directed primarily SAN systems that are designed to provide shared data storage that is beyond the ability of a single host computer to efficiently manage.
Mass data storage systems are implemented in networks or fabrics that provide means for communicating data between systems that use data, and the storage systems that implement the physical storage. In many cases, host computers act as storage servers and are coupled to the network and configured with several disk drives that cumulatively provide more storage capacity or different storage functions (e.g., data protection) than could be implemented by a DAS system. For example, a server dedicated to data storage can provide various degrees of redundancy and mirroring to improve access performance, availability and reliability of stored data. Collecting storage sub-systems, where a separate server manages each sub-system, can form a large storage system. More recently, virtualized storage systems such as the StorageWorks� Enterprise Virtual Array announced by Compaq Corporation in October, 2001 provide storage controllers within a fabric or network that present virtualized storage to hosts that require data storage in a manner that enables the host to be uninvolved in the physical configuration, allocation and management of the storage devices. StorageWorks is a registered trademark of Compaq Computer Corporation. In this system, hosts simply access logical units of storage that appear to the host as a range of logical address space. Virtualization improves performance and utilization of storage.
SAN systems enable the possibility of storing multiple copies or "replicas" of data at various physical locations throughout the system. Data replication across multiple sites is desirable for a variety of reasons. To provide disaster tolerance, copies of data stored at different physical locations is desired. When one copy becomes unavailable due to equipment failure, a local network outage, natural disaster or the like, a replica located at an alternate site can allow access to the data. Replicated data can also theoretically improve access in normal operation in that replicas can be accessed in parallel, avoiding bottlenecks associated with accessing a single copy of data from multiple systems. However, prior systems were organized such that one site had a primary role and another site was a replica. Access requests were handled by the primary site until failure, at which time the replica became active. In such architecture, the replica provided little benefit until failure. Similarly, the resources allocated to creating and managing replicas provided minimal load balancing benefit that would enable data access requests to be directed intelligently to replicas such that resources were used more efficiently. Moreover, when multiple replicas are distributed throughout a network topology, it would be beneficial if network delays associated with accessing a topologically remote storage subsystem could be lessened.
In the past, managing a data replication system required significant time and expense. This time and expense was often related to tasks involved in setting up and configuring data replication on a SAN. Physical storage devices between original and replica locations had to be closely matched which could require knowledge at the spindle level to set up a storage site to hold a replica. Similarly detailed knowledge of the physical devices at a storage site were required to set up logging of replication operations. Moreover, the logical structures used to represent, access and manage the stored data had to be substantially identically reproduced at each storage site. Many of these operations required significant manual intervention, as prior data replication architectures were difficult to automate. This complexity made it difficult if not impossible to expand the size of a replicated volume of storage, as the changes on one site needed to be precisely replicated to the other site. A need exists to provide data replication systems in a SAN that enable functions involved in setup and configuration of a replication system to be automated, and allow the configuration to be readily expanded.
It is desirable to provide the ability for rapid recovery of user data from a disaster or significant error event at a data processing facility. This type of capability is often termed 'disaster tolerance'. In a data storage environment, disaster tolerance requirements include providing for replicated data and redundant storage to support recovery after the event. In order to provide a safe physical distance between the original data and the data to be backed up, the data is migrated from one storage subsystem or physical site to another subsystem or site. It is also desirable for user applications to continue to run while data replication proceeds in the background. Data warehousing, 'continuous computing', and enterprise applications all benefit from remote copy capabilities.
Compaq Corporation introduced a data replication management product in its Array Controller Software (ACS) operating on an HSG80 storage controller and described in U.S. patent application Ser. No. 09/539,745 assigned to the assignee of the present application and incorporated herein by reference. This system implemented architecture with redundant storage controllers at each site. Two sites could be paired to enable data replication. While effective, the HSG80 architecture defined relatively constrained roles for the components, which resulted in inflexibility.
For example, each of the controllers comprised one port that was dedicated to user data, and a separate port that was dedicated to data replication functions. Even where redundant fabrics were implemented, for a given controller both of these ports were coupled to a common fabric switch. Despite the fact that each controller had two ports for communicating with other controllers, one of the ports was constrained in the role of handling user data, and the other port was constrained in the role of handling data replication. Failure of either port would be, in effect, a failure of the entire controller and force migration of storage managed by the failed controller to the redundant controller. Similarly, failure of a communication link or fabric coupled to one port or the other would render the controller unable to perform its tasks and force migration to the redundant controller. Such migration was disruptive and typically required manual intervention and time in which data was unavailable.
As another example, prior data replication management solutions simplified the implementation issues by assigning fixed roles to storage locations. A particular storage site would be designated as a primary when it handled operational data traffic, and another site would be designated as a secondary or backup site. Such architectures were unidirectional in that the backup site was not available for operational data transactions until the failure of the primary site. Such rigidly assigned roles limited the ability to share storage resources across multiple topologically distributed hosts. Moreover, configuration of such systems was complex as it was necessary to access and program storage controllers at both the primary and secondary sites specifically for their designated roles. This complexity made it impractical to expand data replication to more than two sites.
This lack of flexible configuration results in constraints imposed on the configuration and functionality of DRM implementations. Most existing data replication solutions have specific constraints around the number of places that the data may be copied, the simultaneity of multi-directional copies. Further, the specific nature of the synchronicity of the data transmission between sites was per controller, not per volume. As a result, all of the copy sets managed by a particular controller had the exact same initiator and target role designations. Also, all copy sets had to go in one direction such that if a controller was an initiator for one copy set, it was an initiator for all copy sets managed by that controller. Further, the replicas were not allowed to vary from the original in any material respect. The target disks were required to have the same size, data protection scheme, and the like as the original. Prior systems could not readily support dynamic changes in the size of storage volumes.
The lack of flexible configuration constrains the number of replicas that can be effectively created. Current systems allow an original data set to be replicated at a single location. While a single replica is beneficial for disaster tolerance, it is of limited benefit to improving performance benefits from migrating or distributing data to locations closer to where the data is used. A need exists for a data replication system that improves the ability to fan-out a larger number of replicas to improve geographic and topological diversity.
Therefore, there remains a need in the art for a data storage system capable of providing flexible data replication services without the direct involvement of the host computer. Moreover, a data storage system is needed that is readily extensible to provide multiple replication, load balancing, and disaster tolerance without limitations imposed by designating rigid roles for the system components.
Briefly stated, the present invention involves architecture for flexible data replication management comprising first and second storage cells at separate topological locations on a storage area network. Each storage location comprises a storage controller having first and second ports coupled to a communication network, and a pool of storage devices accessible through the controller. Each of the first and second ports communicates both user data and replication data with the communication network. Preferably, each storage location is enabled to operate as a source that initiates replication of data stored within its pool of storage devices, and as a destination for storing replicas of data stored within storage devices of another storage location. Preferably, the communication network comprises redundant subnetworks, and each controller is coupled such that the first port couples to one of the sub-networks and the second port couples to another of the sub-networks.
In general, the present invention describes a data replication management (DRM) architecture comprising a plurality of storage cells interconnected by a data communication network such as a fibre channel fabric. The present invention emphasizes symmetry and peer-cooperative relationships amongst the elements to provide greater flexibility in configuration and operation. Storage cells are for the most part autonomous units of virtualized storage that implement hundreds of gigabytes to terabytes of storage capacity. In accordance with the present invention, each storage cell can act as a source or primary location for data storage, and at the same time act as a destination or secondary location holding a replica data from a primary location of another storage cell. Similarly, the architecture of the present invention seeks to minimize rigid roles placed on interface ports and connections such that all available connections between components can support both host data traffic (e.g., traffic involving data that is to be stored and retrieved), and DRM traffic (e.g., traffic related to managing replicas between storage cells). In this manner, resources are efficiently deployed and operational performance is improved.
The present invention is described with various levels of specificity to ease description and understanding. However, unless specified otherwise, the specific implementations are examples only, and not limitations of the invention. For example, network connectivity is illustrated by fibre channel mechanisms, however, other network mechanisms provide suitable functionality in particular environments. In particular implementations, storage capacity is presented as SCSI (small computer system interface) logical units, although the particular protocol is readily varied to meet the needs of a particular application.
The storage implemented at various sites is accessed by host computer 102, such as host computers 102A, 102B and 102C. Host computers are generally machines that consume or require data storage. Typical host computers 102 demand large quantities of storage such as mainframes, web servers, transaction processors, and the like. However, a host computer 102 may comprise a computer of any processing capacity that requires or benefits from network storage either to reduce cost of the host 102, implement more storage capacity than practical in a host 102, share data amongst multiple hosts 102, or the like. A host computer 102 may couple to the storage cells 101 via a connection to network 103 such as illustrated by host computers 102A and 102B. In many cases, a host computer 102 will be located in a site such as host computer 102C located in site 2. The topological location of host computers 102 is a matter of design choice selected to meet the needs of the particular application. In many cases, one or more host computers 102 will be located at a site. It should be appreciated, however, that host computers 102 have little to do with the management and configuration of the DRM system of the present invention, other than the reality that as consumers of data, the DRM system is preferably able to satisfy storage needs of host computers 102 at various physical and topological locations.
Storage cells 101 and hosts 102 couple to data communication network 103. Storage cells 101 implement a quantity of data storage capacity that is accessible through storage controllers 105 that implement one or more connections to network 101. Storage cells 101 typically implement hundreds of gigabytes to terabytes of physical storage capacity. Preferably, controllers 105 virtualize the physical storage capacity such that it is configurable into logical units (LUNs) of storage capacity. The LUNs implement an arbitrary quantity of logical address block storage, where each LUN has a specified level of data protection such as RAID 0-5 data protection.
The logical construction or context of a storage cell 101 comprises the logical and data structures that are used to represent, manage and configure the raw physical storage capacity into devices that can be accessed by hosts 102 in a desired manner. To do this, controllers 105 implement and manage various logical objects that implement data structures and behavior to represent various components of each storage cell 101, preferably without involvement if hosts 102. All objects in the system are identified with a universally unique identification (UUID). The UUIDs are stored persistently in metadata structures within the physical storage which enables all or part of a storage cell, and all the LUNs implemented therein, to be mapped and presented by any storage controller 105. In a data replication application, the ability to present the LUNs and the context in which they exist is useful, as described in greater detail below, in event of a controller failure at one of the replica sites.
Of particular significance to the present invention is a logical object representing each LUN that is presented to a host system 102. In addition to the UUID, LUNs are also identified by a worldwide LUN ID (WWLID) which identifies the LUN to hosts 102. Hosts 102 access physical storage capacity by addressing read and write operations to specified LUNs using the WWLID, and can be otherwise unaware of the physical storage architecture or data protection strategy for a particular LUN that is being accessed. Storage controllers 105 manage the tasks of allocating physical storage capacity to specified LUNs, monitoring and maintaining integrity of the LUNs, moving data between physical storage devices, and other functions that maintain integrity and availability of the data stored therein.
Network 103 comprises any of a variety of available networks, and may comprises a plurality of interconnected networks. In particular examples, network 103 comprises at least two independent fibre channel fabrics to provide redundancy. These fibre channel fabrics may comprise long-distance connection mechanism 201 such as asynchronous transfer mode (ATM) and Internet protocol (IP) connections that enable sites to be separated by arbitrary distances.
At least one SAN management appliance (SMA) 107 is coupled to network 103 to enable connections to storage cells 101. In practice, a number of SMAs 107 are provided, and typically an SMA 107 is located at each site to provide management operation for the storage cells 101 at that site. However, because each SMA 107 communicates through network 103, the physical location of SMAs 107 is arbitrary. SMAs 107 are preferably implemented at topological locations that provide redundant connections to the storage cells 101.
Network 103 is accessible directly or indirectly to all components at Site 1, Site 2, and Site 3 including hosts 102 and controllers 105. In preferred implementations, each component has redundant links to network 103, and network 103 is preferably implemented as having redundant sub-networks as shown in FIG. 2. Redundancy provides connectivity in event of failure or degradation of some portions of network 103. Redundancy also enables connectivity in event of failure or degradation of controllers 105 and/or interface components of hosts 102. In prior data replication systems, it was known to provide multiple channels between components, however, these channels were not interchangeable. For example, each controller might have two host ports to a network, however, one of the ports was designed to support operational data traffic while the other port was dedicated to data replication operations. While this division of responsibility was simpler to implement, it increased the likelihood that one or the other of the ports would be used at less than full capacity. Moreover, special purpose ports are not completely redundant, hence the system would be vulnerable to failure of one or the other of the channels. Even where two controllers were provided, this asymmetry between ports affected performance.
In the systems of FIG. 1 and
One goal of a disaster tolerant configuration in
In this regard, wherever redundant components are provided, they are preferably interchangeable in accordance with the present invention such that functionality of one component can be taken over by a redundant component. For example, node ports in the SMA 107 are redundant such that failure of one node port can be handled by moving functions handled by that port over to the other, non-failed node-port.
Physical storage devices 302 are coupled to controllers 105 by a high-speed redundant connection such as fibre channel arbitrated loop (FCAL) connections 303 in FIG. 3. An FCAL connection allows each of tens or hundreds of individual hard disk drives to be accessed not only at high speed, but by either controller 105 in a storage cell. Further, by providing redundant FCALs, one FCAL can fail while each storage device 302 remains accessible by either controller. The present invention is largely independent of the specific implementation of physical storage devices 302, and it is contemplated that other physical storage architectures will provide suitable equivalents for purposes of the present invention.
FIG. 3's disaster tolerance configuration provides for high availability with a dual fabric implemented by switches 301, dual hosts 102, and dual storage topology, where a single switch, host, or storage can fail and the system can still continue access on the SAN. Each fabric is composed of two switches 301, with the switches connected to each other over what is called an E-port, or expansion port. The E-port can be a connection with distances that vary depending on technology. Fibre Channel allows for 10 km and with extenders up to 100 km. ATM provides for 'round the world' distances. New technology, called FC-BB (Fibre Channel Backbone), provides the opportunity to extend Fibre Channel over leased Telco lines (also called WAN tunneling). There is no theoretical constraint imposed on the number of switches 301, although a particular implementation may choose to impose such a constraint. With more switches 301, the fabric 103 becomes more complex and port-to-port communications may require more "hops". Hence, both the latency and the variability in latency increase with more complex fabrics.
Hosts 102 preferably run multi-pathing software that dynamically allows failover between storage paths as well as static load balancing of storage volumes (LUNs) between the paths of controllers 102. Multi-pathing software enables a host 102 to identify multiple connection options that lead to desired storage, and select amongst the available paths based on selected criteria. These criteria may vary widely, but typically include path availability, path performance, path load, controller load, and the like. This allows for applications to continue given any failure of fabric or the controllers. A lower cost variant of this configuration uses a fabric comprising only one switch, such that there is no E-port. Such a configuration may be appropriate for shorter distances.
Because ports of controllers 105 are configured to handle both operational data transactions and DRM traffic, a single port connection between each controller 105 and switch 301 is all that is necessary to implement data replication features of the present invention. However, the basic configuration shown in
A SAN, such as shown in FIG. 1 through
As noted before, metadata needed to reconstruct a storage cell 101 including the UUIDs of the various objects in that storage cell is stored persistently. Because of this, in the event of a destination controller failure, another controller 105, typically a redundant or partner controller 105 in the same storage cell 101 as the failed controller 105, can reconstruct the storage cell 101. Other controllers 105 involved in a copy set can continue to locate the now reconstructed storage cell 101, and continue data replication operations without loss of data or requiring manual processes. The ability to implement this level of failure recovery substantially or wholly automatically is unprecedented.
In the event of a connection failure between a source controller 105 and a destination controller 105, the source controller 105 can readily identify each available alternate controller 105 and continue operation without loss of data or requiring manual intervention. A connection failure or link failure is distinct from a controller failure in that the controllers 105 remain operational, but unable to maintain a data communication link with one or more other controllers 105. In response to a connection failure, the source controller has several options, depending on the nature of the failure. When the source controller 105 is unable to link to fabric 103, suggesting a failure in a port of switch 301, the controller 105 can attempt to use an alternate link to fabric 103, or a redundant fabric 103 if available. When the link between fabric 103 and a destination controller 105 has failed, the source controller 105 attempts to establish a new link with a redundant port of the destination controller 105. In both of these cases, there will be no need to reconstruct the storage cell 101, and data replication operations will proceed with substantially no interruption, and in most cases without any need to notify the host 102 of the aberrant condition. In contrast, prior systems had only one port on each controller available for DRM operations and so a link failure would require reconstruction of either the source or destination LUN in an alternate controller.
In some cases a link failure may require migration of a LUN from one controller 105 to another. For example, if all ports on either the destination or source controllers 105 failed (which would typically be considered a controller failure), or several ports to fabric 103 failed simultaneously in particular combination, recovery would require migrating presentation of one or more LUNs from one controller 105 to a redundant or partner controller 105 in a manner similar to a controller failure event. This migration can be performed efficiently using the mechanisms for mapping and presenting a storage cell 101 described above. Notably, all LUNs do not need to be presented before pending data replication operations can be completed. In implementations where the LUNs are virtualized, as described in co-pending patent application Ser. No. 10/040,194 entitled "SYSTEM AND METHOD FOR ATOMIZING STORAGE" filed on Oct. 22, 2001 and which is assigned to the assignee of the present invention and incorporated herein by reference, it is possible to implement only so much of the data structures needed to represent the portion of the LUN that is the subject of a pending data transaction.
A destination virtual disk 602 is allocated within a storage cell 101 at a designated alternative or destination site. In normal operation, write operations are directed to source virtual disk 601, and copied in a background process to one or more destination virtual disks 602. Destination virtual disk has the same logical storage capacity as the source virtual disk, but may provide a different data protection configuration. Controllers 105 of the destination storage cell handle the allocation of destination virtual disk 602 autonomously. This allocation involves creating data structures that map logical addresses to physical storage capacity, and in a particular implementation involve processed described in greater detail in U.S. patent application Ser. No. 10/040,194.
The actual allocation and copying of data may take up to several minutes to several hours in the case of storage of many gigabytes or terabytes. These processes can be streamlined by allocating and copying only logical storage blocks that are used in source virtual disk 601. For example, a virtual disk 601 may implement 1 terabyte of storage, but a sparsely populated example may use only a few gigabytes of capacity to store actual data. In accordance with the present invention, destination virtual disk 602 will reserve resources needed to implement the entire 1 terabyte, but will only allocate and copy the locations that are actually used to store data and may allocate the other locations. This greatly reduces the time required to create replicates.
A "copy set" is a set of member virtual disks where each member virtual disk is a replica of the others, and may comprise any number of replica virtual disks. While it may be easier to describe and understand the present invention by designating one virtual disk as a source or original virtual disk and the others as destinations or replicas, it is important to understand that once the copy set is created each member virtual disk is essentially a peer of all others. To create a copy set, the user designates a virtual disk as the source, and an alternate site storage cell (not a virtual disk) for the destination. The destination virtual disk does not exist prior to the copy set creation operation. Instead, it is created specifically to be a member of the copy set. Because each destination or alternative virtual disk is created on demand, it is created specifically and automatically to be compatible with the copy set. Hence, there is little or no manual procedures that must be performed to create new members for a copy set. This allows the copy set to increase (or decrease) its membership readily.
As noted before, a LUN is identified to a host 102 by a WWLID. One feature of a particular embodiment of the present invention is that each LUN in a copy set is presented to hosts 102 using the same WWLID. In this manner, the LUN appears to the host 102 as a single LUN that can be accessed by multiple paths. Preferably, each controller 105 that manages one of the LUNs in a copy set can be queried by a host 102 to determine a particular LUN or controller 105 (identified by the UUID) that is preferred (but not mandatory) for use by that host for access to the LUN. This feature supports large fan out in that any number of LUNs in a copy set can be presented as a single LUN with replication between the LUNs handled automatically by controllers 105 without involving hosts 102.
Initially, when a controller 105 at the destination site is requested to create a destination virtual disk, it determines whether its storage cell has sufficient resources (e.g., storage capacity) to service the request, reserves the necessary resources if available, and responds back to the controller 105 at the source site that the destination virtual disk is created. An existing virtual disk cannot be used for the destination. This process is very quick as the destination virtual disk is not actually allocated, and the data is not actually copied from source to destination at this time. Once the source virtual disk 601 receives this confirmation, it can continue normal operations while the actual allocation of virtual disk 602 and copying of data can occur as background processes. Hence, the actual time that source virtual disk 602 is quiesced during the data replication initialization is a few milliseconds. It is also possible that accesses to source virtual disk 601 can be cached or buffered during the initialization process so that no downtime is observed from the hosts 102. A controller may support tens, hundreds, or thousands of copy sets, limited only by the practical constraint of the computing resources (e.g., memory and processing power) needed to manage the number of copy sets.
To implement a copy transaction between a source and destination, a path to the alternate site is found and a connection is established. This connection need not be a persistent connection, although for data that frequently changes, a persistent connection may be efficient. Preferably, heartbeat is initiated over the connection. Heartbeats are in both directions, meaning the source site generates a heartbeat on each connection, and the alternate site(s) generates a heartbeat on each connection. Heartbeat timeout intervals are adaptive based on distance (computed round trip delay).
An attempt is made to choose paths by not moving the units between controllers. In other words, a controller that is used to create the source or destination virtual disks is initially preferred, which constrains the number of available paths initially. The chosen path/connection is used until it breaks, then an attempt is made to find another path. The port/path selection algorithm may include other default designations such as a preferred fabric or switch, or preferred ports on controllers, or similar default preferences that may operate to select among redundant resources.
In the preferred implementation, objects do not span sites or storage controllers. Instead, objects exist at each site and are associated with each other as suggested in FIG. 7. For instance, the controller views a "DRM Group" 705 as a source group associated with a destination group (represented by a dashed-line oval in FIG. 7). The controller does not have a copy set object per se, rather group members (virtual disks) that are associated with a remote member's (virtual disks). The copy set is represented by this association. In
DRM groups 705 comprise a set of related virtual disks or LUNs that belong to copy sets all of which have the same source and destination. Multiple groups 705 can exist for a given source and destination combination. While in one sense a group 705 spans sites, in practice a separate logical object that represents a group is implemented in each site (i.e., each controller 105 managing a group). Hence, in another sense each group 705 comprises a set of source halves of copy sets (i.e., the source LUNs 701 and 711), or destination halves of copy sets (i.e., destination LUNs 702 and 712). A group 705 is considered a "local group" by the controller 105 that implements the group logical object, and is considered a "remote group" when implemented by another controller 105. In other words, whether a group 705 is local or remote is determined from the perspective of a particular controller 105. A local group 105 is associated with a remote group 105 when the LUNs contained in each group are in the same copy set. In a multidirectional implementation, each local group 705 will be associated with a plurality of remote groups 105.
In essence, a group contains a collection of LUNS for which a combined I/O stream must be replicated in the LUNs of each remote group to provide certain properties with regard to its interruption (e.g. a copy set holding a database and a copy set holding a journal related to the database). DRM groups 705 are used for maintaining crash consistency and preserving WRITE ordering. Crash consistency refers operation in the event that a host 102 or link to a host 102 crashes during a data transaction. In such event, it is important that the data transaction be committed to all members of the group or fail in all members of the group. In a database/journal implementation, for example, it is important to prevent a situation in which the database is modified, but the journal does not reflect the modification, or vice versa. The consistency property applies when the group has more than one member. In general, more than one virtual disk should be added to a group only if the application requires it. In most cases, a group should comprise only one member for optimal performance, in which cases the crash consistency behaviors are less important.
A group maintains write ordering among the members for asynchronous operation and logging/merging. Asynchronous operation refers to an operation mode in which a modification to one member of a copy set can be propagated to other members of the copy set after a time delay. During this time delay, the various replicas are inexact. When asynchronous operation is allowed, it is important that all replicas eventually implement the modification. Since multiple modification operations may be pending but uncommitted against a particular replica, it is necessary that the original order in which the modifications were presented be preserved when the pending modifications are applied to each replica. Even where asynchronous operation is not explicitly allowed, a destination LUN may become unavailable for a variety of reasons, in which case a copy set is implicitly operating in an asynchronous mode.
To ensure write order preservation, a record is maintained in a non-volatile storage device such as a cache for each group 705 that records the history of write commands and data from a host. The record is sized to store all write transactions until the transaction is committed to each member of a copy set. When required, the record can be written to a log on media-based storage and then later be replayed to merge the pending writes, in order, to each remote group 705. The ordering algorithm uses a "group sequence number" and the remote groups 705 ensure that the data is written in order sequence. Group members enter and exit logging at the same time, to assure order across the volumes.
Virtual disks in a group should have the same alternate site. A group is limited to 32 virtual disks in a particular implementation. A virtual disk can belong to at most one group. Virtual disks in the same DRM group 705 may belong to different disk groups. When a group object is created on the primary site controller, the controller automatically creates a symmetric group object on the alternate site controller. A group is created during copy set creation, if the user chooses not to use an existing group.
At a site, all members of a group are accessed on the same controller in a dual pair to enforce cache coherency (i.e., not split between dual controllers). The preferred storage controller should be the same on all members. When members are added to a group, they are automatically moved to reside on the same controller, and thereafter will failover together. If the preferred storage controller is changed on one member, it will change the setting for all members. These constraints create a configuration in which all members in a group share the same connection/path between source and destination sites. Different groups may share the same connection/path to the same alternate site or a different one. If more than one member in a group needs to copy, then they are copied one at a time with a queue depth selected to keep the pipe full for optimal performance.
One benefit of the flexible architecture described above is that the number of replicas in a copy set can be increased. As noted hereinbefore, conventional systems allow only one replica in a given copy set. In accordance with the present invention, any number of replicas can be included in a copy set. This is because roles can be switched dynamically between source and destination which eases propagation of data across multiple members. Also, because the storage at each site is virtualized, LUNs of any desired size and configuration can be automatically configured from physical storage capacity available at that site. Accordingly, there is no need to specially configure hardware or software at each site in order to implement a LUN that is compatible with a given copy set. Because each controller 105 can automatically increase the size or change the configuration of the LUN(s) it manages, the manual tasks involved to increase the size of a LUN do not grow geometrically or exponentially with the number of replicas in the copy set. Instead, the user simply manages the LUN as a single entity, and the implementation of changes in each replica is handled automatically.
It is apparent that the system of the present invention provides efficiency in that redundant components can operate simultaneously and in parallel to provide improved throughput as well as serving during failover to replace functionality of failed systems and connections. Because system components have few constraints on their functionality, the present invention allows great flexibility in implementing a particular system to emphasize any balance of, for example, low latency, high availability, disaster tolerance, and cost.
Although the invention has been described and illustrated with a certain degree of particularity, it is understood that the present disclosure has been made only by way of example, and that numerous changes in the combination and arrangement of parts can be resorted to by those skilled in the art without departing from the spirit and scope of the invention, as hereinafter claimed.
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|Hewlett-Packard Development Company, L.P.
|Controller-based remote copy system with logical unit grouping
|Mar 30, 2000
|Nov 4, 2003
|Hewlett-Packard Development Company, L.P.
|Controller-based bi-directional remote copy system with storage site failover capability
|Jan 2, 2002
|Apr 13, 2004
|Sun Microsystems, Inc.
|Switch-based scalable performance computer memory architecture
|Mar 26, 2002
|Apr 12, 2005
|Hewlett-Packard Development Company, Lp
|Storage area network, data replication and storage controller, and method for replicating data using virtualized volumes
|Dec 27, 2001
|Dec 19, 2002
|Woodring Sherrie L.
|Port mirroring in channel directors and switches
|Oct 22, 2001
|May 1, 2003
|Lubbers Clark E.
|System and method for atomizing storage
|Dec 19, 2001
|Jun 19, 2003
|Stephen Todd
|Workflow database for scalable storage service
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for ensuring merge completion in a storage area network
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for maintaining order for a replicated multi-unit I/O stream
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for multi-destination merge in a storage area network
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|Data transfer protocol for data replication between multiple pairs of storage controllers on a san fabric
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|Data replication with virtualized volumes
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for dynamically managing memory allocated to logging in a storage area network
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for active-active data replication
|Mar 26, 2002
|Oct 2, 2003
|Clark Lubbers
|System and method for managing data logging memory in a storage area network
|Elkington, Susan, Enterprise Project, Data Replication Manager Functional Specification for VCS V3 Release, Compaq Computer Corporation, Nov. 30, 3001. pp. 1-68.
|ENSA-2 VersaStor Virtualization Technology, Enterprise Storage Group, Storage Works by COMPAQ White Paper, Dec. 2001, Compaq Computer Corporation, pp. 1-10.
|Features and Benefits of HSG80 ACS 8.6P Data Replication Manager, COMPAQ White Paper, Oct. 2001, Enterprise Storage Group, Compaq Computer Corporation, PP. 1-15.
|Features and Benefits of HSG80 ACS 8.6P Data Replication Manager, Oct. 2001, pp. 1-22, Compaq White Paper, Enterprise Storage Group, Compaq Computer Corporation.
|Hess, Randy and Korgaonkar, Anuja, Enterprise Project, DRM Logging, Compaq Computer Corporation, Nov. 25, 2001, pp. 1-12.
|Hoffman, Brian, Enterprise Software Functional Specification V0.10, Compaq Computer Corporation, Jul. 25, 2001, pp. 1-26.
|Information Systems-dpANS Fibre Channel Protocol for SCSI, revision 012, Dec. 4, 1995, pp. i-63, American National Standard-draft.
|Information Technology- Fibre Channel Protocol for SCSI, second version (FCP-2), Nov. 1, 2001, pp. ii-133, American Natiional Standard-draft.
|iSCSI: ISID and the New Persistent Reservations Proposals, http://www.pdl.cmu.edu/mailinglists/ips/mail/msg07055.html, Mar. 19, 2002, pp. 1-4.
|Multi-Directional Architectural Design, pp. 1-3.
|NCITS T10, Project 1144D, Revision 07a, Nov. 1, 2001, pp. 8-26.
|SCSI-2 Spec-Logical characteristics, http://www.uni-mainz.de/~koenig/scsi/SCSI2-06.html, Mar. 8, 2002, pp. 3-31.
|Software Product Description, Compaq SANworks Virtual Replicator-Version 2.0, SPD: 70.41.02, Jun. 5, 2000, pp. 1-5, Compaq Computer Corporation.
|Storage Virtualization and the StorageWorks Enterprise Virtual Array, COMPAQ White Paper, Sep. 2001, Enterprise Storage Array Division Marketing, Compaq Computer Corporation, pp. 1-13.
|StorageWorks by Conpaq Enterprise Virtual Array, QuickSpecs, World Wide- version 5, Feb. 27, 2002, pp. 1-12.
|T10/98-203 revision 0, Persistent Reservations, Jul. 7, 1998, pp. 1-20.
|Understanding Replication in Databases and Distributed Systems, Jul. 13, 1997, Computer Based Learning Unit, University of Leeds, pp. 1-26.
|Citing Patent
|Filing date
|Publication date
|Aug 22, 2003
|Oct 17, 2006
|Hitachi, Ltd.
|Network system and its switches
|Mar 1, 2004
|Dec 12, 2006
|Hitachi, Ltd.
|Method and apparatus for data migration with the efficient use of old assets
|Nov 25, 2003
|Apr 24, 2007
|Hitachi, Ltd.
|Information processing system, storage system, storage device controller and program that enable facilitating the recovery work of remote copying
|Nov 6, 2006
|Jan 8, 2008
|Hitachi, Ltd.
|Method and apparatus implementing virtualization for data migration with the efficient use of old assets
|Feb 8, 2005
|Apr 14, 2009
|Hitachi, Ltd.
|Apparatus for replicating volumes between heterogenous storage systems
|Aug 30, 2005
|Apr 14, 2009
|International Business Machines Corporation
|Fault recovery for transaction server
|Nov 28, 2007
|Jul 21, 2009
|Hitachi, Ltd.
|Method and apparatus implementing virtualization for data migration with volume mapping based on configuration information and with efficient use of old assets
|Feb 17, 2006
|Aug 18, 2009
|Emc Corporation
|Cross tagging to data for consistent recovery
|Aug 2, 2006
|Nov 3, 2009
|Microsoft Corporation
|Creating frequent application-consistent backups efficiently
|Feb 25, 2005
|Nov 24, 2009
|Texas Memory Systems, Inc.
|Distributed asynchronous ordered replication
|Sep 28, 2006
|Dec 1, 2009
|Emc Israel Development Center, Ltd.
|Methods and apparatus for optimal journaling for continuous data replication
|Sep 28, 2006
|Dec 1, 2009
|Emc Israel Development Center, Ltd.
|Methods and apparatus for managing data flow in a continuous data replication system having journaling
|Jan 4, 2007
|Apr 20, 2010
|International Business Machines Corporation
|Storage management in cascaded replication of data
|Jul 13, 2008
|May 4, 2010
|International Business Machines Corporation
|Fault recovery for transaction server
|Jun 27, 2008
|May 18, 2010
|Emc Corporation
|Compressing data in a continuous data protection environment
|Apr 21, 2008
|Jun 29, 2010
|Media Patents, S.L.
|Methods for distributions of digital files
|Dec 12, 2006
|Aug 10, 2010
|Emc Israel Development Center, Ltd.
|Methods and apparatus for point in time data access and recovery
|Dec 26, 2007
|Nov 23, 2010
|Emc (Benelux) B.V., S.A.R.L.
|Methods and apparatus for dynamic journal expansion
|Dec 12, 2006
|Dec 7, 2010
|Emc Corporation
|Methods and apparatus for multiple point in time data access
|Dec 26, 2007
|Dec 28, 2010
|Emc (Benelux) B.V., S.A.R.L.
|Method and apparatus to recover data in a continuous data protection environment using a journal
|Sep 26, 2008
|Feb 1, 2011
|EMC (Benelux)B.V., S.A.R.L.
|Synchronizing volumes for replication
|Dec 26, 2007
|Jun 7, 2011
|Emc (Benelux) B.V., S.A.R.L.
|Method and apparatus to convert a logical unit from a first encryption state to a second encryption state using a journal in a continuous data protection environment
|Apr 28, 2009
|Jun 14, 2011
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Nov 20, 2009
|Jun 21, 2011
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Feb 8, 2010
|Jul 19, 2011
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Apr 28, 2009
|Sep 27, 2011
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Dec 26, 2007
|Oct 18, 2011
|Emc Corporation
|Offloading encryption processing in a storage area network
|Apr 28, 2009
|Nov 8, 2011
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Mar 28, 2008
|Nov 15, 2011
|Emc (Benelux) B.V., S.A.R.L.
|Consolidating snapshots in a continuous data protection system using journaling
|Sep 26, 2008
|Nov 15, 2011
|Emc (Benelux) B.V., S.A.R.L.
|Initializing volumes in a replication system
|Jun 9, 2011
|Jan 3, 2012
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Sep 15, 2009
|Jan 10, 2012
|Symantec Corporation
|Intelligent device and media server selection for optimized backup image duplication
|Jun 27, 2008
|Jan 31, 2012
|Emc B.V., S.A.R.L.
|Replicating a thin logical unit
|Apr 28, 2009
|May 22, 2012
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Nov 20, 2009
|May 22, 2012
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Apr 1, 2003
|Jun 19, 2012
|Emc Israel Development Center, Ltd.
|Apparatus for continuous compression of large volumes of data
|Nov 20, 2009
|Aug 28, 2012
|Media Patents, S.L.
|Methods for transmitting multimedia files and advertisements
|Jun 23, 2010
|Dec 11, 2012
|Emc Corporation
|Splitter used in a continuous data protection environment
|Dec 2, 2010
|Dec 18, 2012
|Emc International Company
|Replicating in a multi-copy environment
|Sep 29, 2010
|Dec 18, 2012
|Emc Corporation
|Storage array snapshots for logged access replication in a continuous data protection system
|Mar 30, 2010
|Mar 5, 2013
|Emc International Company
|Accessing a volume in a distributed environment
|Sep 27, 2010
|Apr 30, 2013
|Emc International Company
|Virtualized consistency group using an enhanced splitter
|Sep 27, 2010
|Jul 2, 2013
|Emc International Company
|Virtualized consistency group using more than one data protection appliance
|Jan 23, 2008
|Jan 7, 2014
|International Business Machines Corporation
|Protocol independent server replacement and replication in a storage area network
|May 21, 2010
|Feb 4, 2014
|Media Patents, S.L.
|Process for the on-line sale of a software product
|May 21, 2010
|Feb 4, 2014
|Media Patents, S.L.
|Process for the on-line sale of a software product
|Aug 22, 2012
|Mar 18, 2014
|Zaron Remote Llc
|Methods and transmitting multimedia files and advertisements
|Sep 29, 2010
|Apr 8, 2014
|Emc Corporation
|Using I/O track information for continuous push with splitter for storage device
|Apr 1, 2013
|Sep 9, 2014
|Emc International Company
|Virtualized consistency group using an enhanced splitter
|Nov 9, 2012
|Sep 16, 2014
|Fujitsu Limited
|Storage apparatus and command execution control method
|Sep 15, 2009
|Sep 30, 2014
|Hewlett-Packard Development Company, L.P.
|Enhanced virtual storage replication
|Sep 7, 2011
|Nov 25, 2014
|Emc Corporation
|Write signature command
|Mar 14, 2013
|Mar 31, 2015
|Emc Corporation
|Accessing an image in a continuous data protection using deduplication-based storage
|Oct 8, 2009
|Mar 31, 2015
|Microsoft Corporation
|Modeling distribution and failover database connectivity behavior
|Sep 24, 2010
|Apr 14, 2015
|Hewlett-Packard Development Company, L.P.
|Load balancing data access in virtualized storage nodes
|Jan 10, 2014
|May 5, 2015
|Emc Corporation
|Using I/O track information for continuous push with splitter for storage device
|Jun 24, 2013
|Jun 30, 2015
|Emc International Company
|Dynamic granularity in data replication
|Mar 15, 2013
|Jul 14, 2015
|Emc Corporation
|Synchronous and asymmetric asynchronous active-active-active data access
|Jun 24, 2013
|Jul 21, 2015
|Emc International Company
|Consistency across snapshot shipping and continuous replication
|Mar 14, 2013
|Aug 18, 2015
|Emc Corporation
|Continuous data protection using deduplication-based storage
|Nov 3, 2003
|May 6, 2004
|Wesinger Ralph E.
|Firewall providing enhanced netowrk security and user transparency
|Nov 25, 2003
|Sep 2, 2004
|Hitachi, Ltd.
|Information processing system, storage system, storage device control apparatus and program
|Aug 22, 2003
|Jan 13, 2005
|Hitachi, Ltd.
|Network system and its switches
|Nov 5, 2003
|May 5, 2005
|Kris Land
|Data distributor
|Mar 1, 2004
|Sep 1, 2005
|Akira Fujibayashi
|Method and apparatus for data migration with the efficient use of old assets
|Feb 25, 2005
|Sep 15, 2005
|Richard Testardi
|Distributed asynchronous ordered replication
|Jun 13, 2005
|Nov 3, 2005
|Clark Lubbers
|Flexible data replication mechanism
|Apr 20, 2005
|Nov 3, 2005
|Satoshi Yamatake
|Image database system
|Feb 8, 2005
|Aug 10, 2006
|Hitachi, Ltd.
|Method and apparatus for replicating volumes between heterogenous storage systems
|Jan 28, 2005
|Aug 17, 2006
|Hewlett-Packard Development Company, L.P.
|Storage replication system with data tracking
|Apr 18, 2006
|Aug 24, 2006
|Hitachi, Ltd.
|Network system and its switches
|Apr 1, 2003
|Sep 21, 2006
|Kashya Israel Ltd.
|Apparatus for continuous compression of large volumes of data
|Apr 14, 2011
|Microsoft Corporation
|Modeling distribution and failover database connectivity behavior
|U.S. Classification
|International Classification
|Cooperative Classification
|European Classification
|Jun 21, 2002
Owner name: COMPAQ INFORMATION TECHNOLOGIES GROUP, L.P., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LUBBERS, CLARK;ELKINGTON, SUSAN;HESS, RANDY;AND OTHERS;REEL/FRAME:013026/0848;SIGNING DATES FROM 20020325 TO 20020604
|May 12, 2004
|Mar 20, 2009
|Fee payment
Year of fee payment: 4
|Feb 26, 2013
|Fee payment
Year of fee payment: 8


text:
The Pipers' Tryst Hotel
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- Continental Breakfast
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TripAdvisor Reviews The Pipers' Tryst Hotel Glasgow
Travel Blogs from Glasgow
Catch up's
... for about three years. We will be with him for the next three days.. He is having a three week holiday in the States driving American cars and visiting car shows. It rained a bit today but not cold.
Love Etta xxx
Offline Videos, eBooks and a Personified Number
... or tutorials usually rounded off a pretty good study session on a train, plane or automobile.
And that independent form of study was definitely the necessary style of learning here. Not that it is bad, simply a different dynamic in classes of 200 people. I don't think any of my professors would know who I am beyond my identity as 2174447 for which they might categorize my grades and identify my email correspondence. Overall, despite some engaging ...
Misty Scottish Highlands and Cumbria
... Ness and, obviously, not a monster to be seen. A beautiful, stunning day though, and the water was as calm as a millpond when we first started, got a bit choppier a bit further on. We stopped at a wee place called Fort William for lunch (our coach driver said he is up this way all the way the time and has only seen it fine on 4 days in the last year - five now!!) and then continued on past Loch Lomond and on to Stirling. Our hotel in Stirling ...
When I called you last night from Glasgow...
... trees, fish and bells. He is the patron saint of Glasgow and those accused of infidelity. Hmmm.
From the Cathedral we drove through the Merchant's City to the People's Palace - a communist-sounding brick of a building near a beautiful fountain by the river. The museum is free, quite notably, but the real feature are the Winter Gardens reached by walking through the Palace into a large greenhouse in the ...
Ah Belong tae Glesga
... 8211; though the hostel itself was very well run and professionally setup.
We head out for a curry – believe or not, a Glasgow institution – challenging London's claim to Indian cuisine, and are rewarded with finding an excellent Southern Indian restaurant. Different style of food and prepared to a high standard – Glasgow curry can hold its head high !
Off to Stirling the next day, to visit the Wallace Monument and Stirling Castle. Here begins ...

subset: commoncrawl


text:
content insight from user surveys
all about creating effective surveys
in which I write about stuff
all about creating effective surveys
I don't have a one-sentence summary for this. sorry.
to which I have strangely crabby reactions.
fascinating presentation about content strategy integrated into a redesign at Harvard College (alas my brain melted before it was over.)
on Agile process and content strategy, mostly.
A variety of methods, and how to scale them. Also, be good to your interns.
very intro-level.
Digital storytelling at GE
Just some early morning stream-of-consciousness before the day gets going.
These are the EXCEPTIONALLY rough and wild notes. Something more coherent should appear in the next few days.


text:
Six degrees of Michael Bublé
Let's see how we can connect Michael Bublé to His Excellency Marwan Ahmad Al SawalehMarch 12, 2015 3:00
Register for our free newsletter
MIDEAST STOCKS-Markets to rise on stronger global environment
Abu Dhabi's ADWEA in talks with banks for $350 mln project bond
Emirates hints at no Dubai Airshow orders, pushes decision on A350/787 to next year
UAE minister says plans to boost oil output capacity on track
MIDEAST STOCKS-Saudi, Egypt markets barely move in early trade
Qatar Q2 GDP growth accelerates to 4.8 pct year/year
UAE says reforms will better protect foreign workers
United Arab Bank secures $125 mln three-year loan
MIDEAST STOCKS-Saudi hit by weak oil, commodities; Egypt down modestly
MIDEAST STOCKS-UAE markets narrowly mixed in thin, early trade
Let's see how we can connect Michael Bublé to His Excellency Marwan Ahmad Al SawalehMarch 12, 2015 3:00
Come on, Kippers, it's the weekend!March 12, 2015 12:00
Since the British singer/songwriter will be performing on Thursday,March 5, Kippreport figured out how he is connected to the Chairman of Apparel Group...March 4, 2015 3:35
Kippreport headed to the DJF last weekend, here is a review of the event through images…March 1, 2015 5:19
The British singer-songwriter is all set to enthral his Dubai audience with a number of hitsFebruary 26, 2015 5:30
Watch this space every Thursday for short break ideasOctober 9, 2014 5:24
The arrival of the Queen of Pop to the UAE capital is one more step towards the UAE capital's long-term goal of becoming a global entertainment and cultural hub. How much dividends will it pay back?February 28, 2012 11:47
Abu Dhabi sets its sight on pulling off the concert of a century with Madonna's world tour. But with the concert scheduled for June 3, will the summer heat keep the fans away?February 8, 2012 4:53
Kipp was expecting news of a book deal. We wouldn't even raise an eyebrow to Charlie Sheen getting his train wreck of a life on a TV movie. Let the producers and studio waste their money. But we didn't expect that a multi-million dollar tour.March 21, 2011 5:15
Abu Dhabi entices with its weekend getaways while Dubai banks on a tried and tested formula. But is it too tried and tested, asks Precious de Leon.March 8, 2011 5:16


text:
Royalty Free Music Unique To Your Project - Every Time
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The following tracks match: Elegant, Innocent
Rebuilding A NationA foundationally rich track with dramatic and rolling shifts led by horns, piano and woodwinds create a proud feeling.https://www.smartsound.com/strata/images/STRATOH_200.jpgSingle7100162-ST$ 39.957100162-EX$ 69.957100162-W$ 149.95Genre: Elegant, Nostalgic, Processional, Sophisticated, Orchestral Keywords: Inspirational, Atmospheric, Delicate, Dignified, Dramatic, Expansive, Gentle, Innocent, Inspiring, Majestic, Pastoral, Patriotic, Serene, Solemn, Suspenseful, Touching, Uncertain, Hopeful, Emotional, Quiet Instrument: Orchestra, Studio Orchestra, Piano, Strings, Instrumental Production Types: Documentary, Indie Film, Suspense, Action-Drama, Biography, Tribute/Memorial, Background
Rebuilding A Nation from the album Orchestral Hues
A Fine ProspectA relaxed acoustic guitar feature, ideal for showing a steady, reliable corporate presence.https://www.smartsound.com/strata/images/STRATPZ2_200.jpgSingle7100117-ST$ 39.957100117-EX$ 69.957100117-W$ 149.95Genre: Elegant, Folk, Outdoorsy, Country/Folk, Corporate/Technology, Easy-Going Keywords: Exciting, Positive, Uplifting, Inspirational, Confident, Delicate, Gentle, Heartwarming, Innocent, Inspiring, Motivating, Reflective, Refreshing, Serene, Soothing, Tender, Touching, Hopeful, Poignant, Quiet, Simple Instrument: Country Band, Bass (Electric), Guitar (Acoustic), Percussion, Acoustic, Instrumental, Guitar Production Types: Commercials, Corporate, Documentary, Indie Film, Nature, Short Film, Biography, Corporate Communications, On Hold Music, Product Videos, Training, Tribute/Memorial, Background
A Fine Prospect from the album Positive Biz Vol 2
Magical Encounterhttps://www.smartsound.com/artist/images/ASFB03_200.jpgSingle7100034-ST$ 39.957100034-EX$ 69.957100034-W$ 149.95Genre: Earthy, Elegant, Outdoorsy, Romantic, Sophisticated, Orchestral Keywords: Positive, Inspirational, Atmospheric, Calm, Delicate, Expansive, Gentle, Heartwarming, Hypnotic, Incessant, Innocent, Inspiring, Intimate, Panoramic, Passionate, Pensive, Powerful, Refreshing, Relaxed, Serene, Soothing, Touching, Tranquil, Ambient, Emotional, Magical, Poignant Instrument: Orchestra, Studio Orchestra, Celeste, Percussion, Piano, Piano (Electric), Strings, Violin, Violoncello, Acoustic, Instrumental Production Types: Animation, Cinematic, Commercials, Documentary, Nature
Magical Encounter from the album Magical Moments
Raindrop Dancehttps://www.smartsound.com/artist/images/ASFB03_200.jpgSingle7100029-ST$ 39.957100029-EX$ 69.957100029-W$ 149.95Genre: Elegant, Orchestral Keywords: Exciting, Positive, Inspirational, Bold, Delicate, Dramatic, Effervescent, Ethereal, Fresh, Gentle, Heartwarming, Hypnotic, Incessant, Innocent, Inspiring, Mechanical, Melancholy, Motivating, Passionate, Pensive, Powerful, Refreshing, Serene, Touching, Hopeful, Emotional, Fantasy, Magical Instrument: Orchestra, Studio Orchestra, Celeste, Flute, Guitar (Acoustic), Guitar (Electric), Piano, Strings, Violin, Violoncello, Acoustic, Instrumental, Guitar Production Types: Cinematic, Commercials, Documentary, Nature, Film Trailer
Raindrop Dance from the album Magical Moments
Silhouette Of LoveThis Solo Piano piece is full of tenderness and will gently enhance any scene that need an extra dose of calm and serenity.https://www.smartsound.com/producer/images/PS70_200.jpgSingle12210-ST$ 39.9512210-EX$ 69.9512210-W$ 149.95Genre: Elegant, Romantic, Classical, Ballad Keywords: Calm, Delicate, Gentle, Heartwarming, Innocent, Intimate, Melancholy, Refined, Reflective, Serene, Soothing, Tender, Touching, Tranquil, Hopeful, Angelic, Emotional, Quiet, Soft Instrument: Solo, Acoustic, Instrumental Production Types: Commercials, Indie Film, Nature, Wedding, Biography, Tribute/Memorial
Silhouette Of Love from the album Day Dreams (PS70)
InisheerA pleasant Irish ballad featuring accordion and guitar.https://www.smartsound.com/producer/images/PS63_200.jpgSingle11502-ST$ 39.9511502-EX$ 69.9511502-W$ 149.95Genre: Elegant, Folk, Nostalgic, Romantic, Traditional, World, Ballad, Irish, Ireland, Celtic Keywords: Calm, Delicate, Gentle, Heartwarming, Innocent, Intimate, Light, Reflective, Tender, Tranquil, Quiet Instrument: Accordion, Bass (Electric), Guitar (Acoustic), Vibraphone, Acoustic, Instrumental, Guitar Production Types: Nature, Travel, Home Videos
Inisheer from the album Celtic Evolution (PS63)
Morning SunThis heartwarming acoustic guitar piece is ideal for intimate scenes.https://www.smartsound.com/producer/images/PS28_200.jpgSingle6204-ST$ 39.956204-EX$ 69.956204-W$ 149.95Genre: Elegant, Romantic, Themes, Ballad, Lyrical, Country/Folk Keywords: Delicate, Gentle, Heartwarming, Innocent, Intimate, Reflective, Soothing, Tender, Mellow Instrument: Guitar (Acoustic), Acoustic, Instrumental, Guitar Production Types: Biography, Spoken Word/Narration, Tribute/Memorial
Morning Sun from the album Homespun Guitar (PS28)
Lasting ImpressionPlace this tranquil ballad under your favorite scenes of family and home. The piano moves with a longing that is sure to stir your emotions.https://www.smartsound.com/producer/images/ps15_210.jpgSingle31505-ST$ 39.9531505-EX$ 69.9531505-W$ 149.95Genre: Elegant, Themes, Ballad, Lyrical, Indie, Specialty Keywords: Delicate, Gentle, Innocent, Reflective, Mellow Instrument: Solo, Piano, Acoustic, Instrumental Production Types: Indie Film, Short Film, Biography, Tribute/Memorial, Background
Lasting Impression from the album Portraits / Solitude / Intimate (PS15)
Magical MomentTwinkling with inspired melodies and cadences, it makes the right fit for any heartfelt visual context.https://www.smartsound.com/producer/images/ps15_210.jpgSingle31506-ST$ 39.9531506-EX$ 69.9531506-W$ 149.95Genre: Elegant, Themes, Ballad, Lyrical, Indie, Specialty Keywords: Delicate, Gentle, Innocent, Reflective, Mellow, Hopeful, Quiet, Soft Instrument: Solo, Piano, Acoustic, Instrumental Production Types: Indie Film, Short Film, Biography, Tribute/Memorial, Background
Magical Moment from the album Portraits / Solitude / Intimate (PS15)
Make A WishShimmering with earnest melodies, this solo piano journey is a fitting complement to all images about trust.https://www.smartsound.com/producer/images/ps15_210.jpgSingle31507-ST$ 39.9531507-EX$ 69.9531507-W$ 149.95Genre: Elegant, Lyrical, Easy-Going, Indie, Specialty Keywords: Positive, Delicate, Gentle, Innocent, Inspiring Instrument: Solo, Piano, Acoustic, Instrumental Production Types: Indie Film, Short Film, Biography, Tribute/Memorial, Background
Make A Wish from the album Portraits / Solitude / Intimate (PS15)
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text:
Pumpkin White Chocolate Chip Muffins
As we near the end of pumpkin season, I have a new pumpkin recipe to share. I woke up Sunday morning in the mood for muffins. I considered the two recipes already on my blog, Pumpkin Cream Cheese Muffins and Pumpkin Nut Muffins with Molasses Glaze, but realized I didn't have all the ingredients for either one. You can't really have too many pumpkin muffin recipes can you? So, a new one it was!
This recipe was pretty quick & easy to throw together. The muffins came out tasting fantastic! The flavors of pumpkin & white chocolate pair exceptionally well together, but then again I already know that because of how huge a hit these Pumpkin Cream Cheese Truffles are on my blog. I think these would be a great Thanksgiving morning snack as you prepare the big meal. Happy Thanksgiving everyone! I'm so thankful for each and every one of my blog readers. I know I don't have anywhere near the best blog out there, and my posts are very much sporadic, so I'm thankful you have continued to read and hopefully enjoy my posts.


text:
If you're using UCallWeConn to call to Bahrain, however, you can omit the International Call Prefix. You'd simply dial
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Dialling instructions for cheapest calls from Bahrain to Chile.
A translation of this page into Russian: Дешевые звонки из Чили в Бахрейн
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Amendment of the rules to implement provisions of the Cable Communications Policy Act of 1984 (P.L. 98-549); decision by USCA-DC hold- ing that must-carry rules violate cable operators First Amendment rights.
Download OptionsReleased: September 10, 1985
Note: We are currently transitioning our documents into web compatible formats for easier reading. We have done our best to supply this content to you in a presentable form, but there may be some formatting issues while we improve the technology. The original version of the document is available as a PDF, Word Document, or as plain text.


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Susan Kuchinskas | January 9, 2012 | Comments
Combo will let large brands run global programs, firms say.
Demand-side platform DataXu has acquired Mexad, another DSP with offices in Europe and Latin America. The combo will let large brands run global programs at scale, the companies said.
DataXu's digital marketing management platform, DX3, includes analytics, audience and attribution management features.
Mexad provides technology and services that let agency clients use auction-based exchange technologies to buy Internet ad space. It has access to more than 15 billion real-time ad impressions per day, the companies said.
But the key to the purchase was Mexad's feet on the ground: offices in Europe and South America servicing more than 60 countries.
"It's great to have the best technology, but we learned that people want a global footprint. A salesperson over in London is not enough," said Julie Ginches, VP of marketing for DataXu. "Mexad is the leading service provider in Europe. They have smart data and analytics people who help you understand the insights that the platform will deliver for you."
DX3 is positioned as enterprise software-as-a-service, and it powers five of the six agency DSPs, according to Ginches. But with DataXu's new global reach, she sees big brands and marketers licensing the software for in-house use - rather than paying agencies a markup.
Where does that leave agencies?
While smart agencies are building their analytics benches, she suggests, "Brands can use DataXu's services to run the platform, have an agency run it for them via agency trading desks, or manage it themselves and use an agency for strategy and creative." She points out that, with the trend toward data and analytics driving all digital advertising, agencies don't have enough analytics talent in-house.
DSPs have proven popular with agencies, and dollar volume was expected to more than double from 2010 to 2011, with Google's Invite Media demand-side platform growing 300 percent in the first six months post-acquisition.
Jim Payne, CEO of mobile advertising platform MoPub, says this kind of consolidation is good for the industry - especially for agencies and especially in mobile.
MoPub is focused on monetizing mobile apps. In October 2011, it announced the launch of MoPub Marketplace, a self-service, real-time bidding platform for mobile advertising that provides inventory to DataXu and other DSPs.
Payne says, "Agencies want to look at mobile as one portion of the media plan and spend across media without thinking too hard about it. The pain point right now is, in mobile, you do have to think about it and talk to different companies. But consumer adoption and usage is so high that agencies want these things to be solved now."
Pro Rank Tracker is a cutting-edge ranking tracking tool for keeping you up-to-date with all the latest changes in the rankings of your websites and videos.
Susan Kuchinskas has covered interactive advertising since its invention. The former staff writer for Adweek, Business 2.0, and M-Business covers technology, business and culture from Berkeley, CA.
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Pamela Karlan
Election Law, Guns / Firearms, Non-Sequiturs, Technology
* Lawyers are too lonely. Well, it's not easy to find friends when you're the most despised profession in the world. [Law and More]
* A prosecutor managed to shoot out the window of the D.A.'s office while playing with another prosecutor's gun. The boss is mad, but really, what's the point of having guns if you can't treat them like toys? [Waco Tribune]
* Typical traffic stop turns into anal cavity search because clenching your buttocks during a pat down is probable cause for a prostate exam. [KOB 4]
* Lawyer informed by judges that "not everything on the internet is reliable." [IT-Lex]
* It's release day for Keith Lee's new book The Marble and the Sculptor: From Law School to Law Practice (affiliate link). [Associate's Mind]
* Texas has hired Texas Law grad Steve Patterson as its new athletic director, poaching him from the same position at Arizona State. I wonder if Todd Graham will slimily bail on another school and join his old boss at Texas when Mack Brown is unceremoniously fired. [CBS Sports]
* Michelle Mumford, the former Milbank associate who went public with her negative experience of being pregnant working in the firm's litigation department, is now the admissions dean at BYU Law. If any institution is sympathetic to pregnancy, it would be the Mormon Church. [The Careerist]
* Professor Pamela Karlan explains how political gridlock is the result of the Framers' failure. I refuse to believe a gathering of slaveholding farmers didn't construct a perfect system. [Boston Review]
* Judge tells lawyers they can't withhold their fee structure as confidential when he can look it up in other cases. Was their theory that the judge was stupid? [South Florida Lawyers]
Conferences / Symposia, Constitutional Law, Election Law, Gay, Gay Marriage, Minority Issues, Politics, SCOTUS, Supreme Court
SCOTUS Could Strip Blacks Of Rights And Expand Gay Rights On The Same Day
Court decisions are more influenced by the popular will than they seem.
Inventors Will Lead the Legal Future not Licensees
David McCullough's The Wright Brothers serves as an ideal case study on the requirements to innovate; a desire to learn, perseverance, and work ethic. I read it in route to a wonderful opportunity to serve as visiting lecturer for Professor and Parsons Behle & Latimer attorney Randy Dryer's innovative Technology and Modern Litigation course at […]
Anthony Kennedy, Antonin Scalia, Barack Obama, Elena Kagan, Federal Judges, Law Professors, Neal Katyal, Old People, Politics, R. Ted Cruz, SCOTUS, SCOTUS Potential, Sonia Sotomayor, Stephen Breyer, Supreme Court
What Will a Second Obama Term Mean for the Supreme Court?
Which justices might retire, and who might replace them?


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Author has written 14 stories for Vampire Knight, Skip Beat!, and Inuyasha.
A little about me:
1. English is not my native language. I do not use english in my daily life, but only in ff.net
9. Starting with february 16 I created an account on dokuga. I go there under the name Ruka_Park (decided to post this for I to clear any future misunderstanding)
Update about my ongoing stories:


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Shameless: Season 4, Episode 3
Like Father, Like Daughter (26 Jan. 2014)
Ratings: 8.6/10 from 430 users
Reviews: write review | 2 critic
Fiona and Mike take a big step forward when Mike invites her to dinner with his family. She meets his parents and older brother, who is a thrill seeking ex-alcoholic. Debbie fools Shelia ... See full summary »
Director:Sanaa Hamri
Writers:John Wells (developer), Paul Abbott (creator), 1 more credit »


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Don't give the black man food, give they red man liquor
Lyric Meaning
Lupe states the title of his album, Food and Liquor, is based on his philosophy that life is made up of good things and necessities and evil things that seduce people to the dark side. Food represents the good and necessities, and Liquor(Lupe never drank a day in his life) the bad. So with this line, he's basically saying they kept rights and necessities/good things from the black people and imposed bad things upon the Indians. He goes back to history class and uses this intelligent way to basically display how America screwed over everyone else at some point in time
Like the name of this song suggests, Conspiracies in American have always been a part of the history from the Freemasons to the illuminatti. This line right here is just basically stating that the government treated African Americans as the 3/5 humans that they were considered and kept them as slaves and after they were set free they had to fend for themselves, oftentimes leaving themselves and their children to start. The red man refers to Native Americans and they were given liquor by the "white man" after Westward Expansion. The sad thing is that Native Americans now have a population that consists of 50% alcoholics and it could be the seen as the fault of the white man who gave the liquor to them in excess and fueled this addiction
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Peasedown St John Primary School
- Name:
- Peasedown St John Primary School
- Address:
- Bath Road, Peasedown St John
- Postcode/City:
- BA2 8DH Peasedown St John
- County:
- Somerset, England
- Phone:
- 01761 43231101761 432311
- Fax:
- 01761 432311
- Website:
- www.peasedownstjohnprimary.org.uk
- E-mail:
- Send message
Updated 2 months ago | Claim This Business| Report Incorrect Data
Peasedown St John Primary School places children at the heart of everything that we do, with a commitment to "achieving excellence for ourselves and others". That is why OFSTED says we are a good school with many outstanding features; where children enjoy coming to school and everyone shares the ambition to do the very best for all pupils.
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Lighthouse DreamA unique somber track that is illustrating a characters loneliness or emotional detachment.https://www.smartsound.com/filmscore/images/FSCSG01_200.jpgSingle68508-ST$ 39.9568508-EX$ 69.9568508-W$ 149.95Keywords: Mysterious, Atmospheric, Dramatic, Melancholy, Pensive, Reflective, Tender, Touching, Ambient, Drama, Mellow, Emotional, Soft Genre: Orchestral Production Types: TV/ Film Drama, Documentary, Indie Film, Biography Instrument: Orchestra, Guitar (Acoustic), Piano (Electric), Instrumental, Guitar
Twilight RooftopsA calm and subdued minimalist backrdrop, great for scenes of discovery and wonder.https://www.smartsound.com/filmscore/images/FSAPF02_200.jpgSingle63810-ST$ 39.9563810-EX$ 69.9563810-W$ 149.95Keywords: Mysterious, Atmospheric, Hypnotic, Mystical, Soothing, Subdued, Abstract, Angelic, Soft Genre: Ambience, World, Minimalism, Electronic Production Types: Cinematic, Documentary, Film Trailer, Background Instrument: Instrumental
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A Little OffA highly dynamic track that conveys somber mystery and intense uneasiness, ideal for a spy-action-thriller story line.https://www.smartsound.com/filmscore/images/FSCSG01_200.jpgSingle68502-ST$ 39.9568502-EX$ 69.9568502-W$ 149.95Keywords: Mysterious, Ominous, Brooding, Desolate, Dramatic, Haunting, Mystical, Sad, Scary, Serious, Sinister, Suspenseful, Drama Genre: Orchestral, Noir Production Types: TV/ Film Drama, Cinematic, Indie Film, Video Games, Horror, Suspense Instrument: Orchestra, Instrumental
A Little Off from the album Craig Stuart Garfinkle Vol 1 - Emotive & Dramatic
Angular ShadowsSlow-building strings create a romantic-yet-uneasy feeling, perfect for those long distant or star-crossed lovers.https://www.smartsound.com/filmscore/images/FSCSG01_200.jpgSingle68503-ST$ 39.9568503-EX$ 69.9568503-W$ 149.95Keywords: Mysterious, Dramatic, Hypnotic, Mystical, Pensive, Sad, Suspenseful, Uncertain, Drama, Abstract, Emotional, Investigative Genre: Orchestral Production Types: TV/ Film Drama, Indie Film, Suspense Instrument: Orchestra, Guitar (Acoustic), Instrumental, Guitar
Angular Shadows from the album Craig Stuart Garfinkle Vol 1 - Emotive & Dramatic
Epic ChronicleHeavy percussion and strong string sections creates dramatic tension before and/or during your epic battle scene.https://www.smartsound.com/filmscore/images/FSCSG01_200.jpgSingle68507-ST$ 39.9568507-EX$ 69.9568507-W$ 149.95Keywords: Energetic, Mysterious, Edgy, Ominous, Bold, Brooding, Desolate, Dramatic, Fierce, Haunting, Heroic, Intense, Powerful, Sad, Scary, Serious, Sinister, Somber, Suspenseful, Drama, Angry Genre: Orchestral, Noir Production Types: TV/ Film Drama, Cinematic, Film Trailer, Video Games, Epic, Suspense, Action-Drama Instrument: Orchestra, Instrumental
Epic Chronicle from the album Craig Stuart Garfinkle Vol 1 - Emotive & Dramatic
Surge Of PowerA moody, dramatic piece that works well during emotional scenes, or a hero realizing his potential or destiny.https://www.smartsound.com/filmscore/images/FSAPF05_200.jpgSingle67908-ST$ 39.9567908-EX$ 69.9567908-W$ 149.95Keywords: Mysterious, Ominous, Atmospheric, Dramatic, Incessant, Melancholy, Sad, Serious, Solemn, Somber, Suspenseful, Drama, Poignant Genre: Nostalgic, Orchestral Production Types: TV/ Film Drama, Cinematic, Film Trailer, Video Games, Suspense Instrument: Orchestra, Percussion, Instrumental
Surge Of Power from the album Amotz Plessner & Friends Vol 5 - Rise To Power
WarlordsThis ever-building march-esque piece works wonderfully leading up to a final battle or fight sequence. Features strings and choir.https://www.smartsound.com/filmscore/images/FSAPF05_200.jpgSingle67910-ST$ 39.9567910-EX$ 69.9567910-W$ 149.95Keywords: Driving, Energetic, Ominous, Bold, Competitive, Dramatic, Sinister, Suspenseful, Action, Drama Genre: Orchestral, Gothic Production Types: TV/ Film Drama, Film Trailer, Video Games, Epic, Action-Drama Instrument: Orchestra, Instrumental
Warlords from the album Amotz Plessner & Friends Vol 5 - Rise To Power
Dark City-UGMSerious events are imminent in this orchestral-rock force. The tension builds until the final impact.https://www.smartsound.com/filmscore/images/FSAPF03_200.jpgSingle63902-ST$ 39.9563902-EX$ 69.9563902-W$ 149.95Keywords: Mysterious, Edgy, Ominous, Dramatic, Intense, Pulsating, Punchy, Scary, Suspenseful, Tense, Thrilling, Action, Drama, Chase, Heavy Genre: Orchestral Production Types: Cinematic, Film Trailer, Video Games, Epic, Suspense, Action-Drama Instrument: Orchestra, Strings, Acoustic, Instrumental
Dark City-UGM from the album Amotz Plessner & Friends Vol 3 - Dynamic Scoring
The Puzzle SolverCovert operations are going down in this sneaky and pulsing soundtrack.https://www.smartsound.com/filmscore/images/FSAPF02_200.jpgSingle63807-ST$ 39.9563807-EX$ 69.9563807-W$ 149.95Keywords: Mysterious, Atmospheric, Pulsating, Scary, Somber, Subdued, Suspenseful, Drama, Sneaky, Abstract, Heavy, Investigative Genre: World, Downtempo, Electronic Production Types: Cinematic, Documentary, Film Trailer, Video Games, Suspense, Action-Drama, Background Instrument: Instrumental
Film Noir 3Shifty eyes and steely glances permeate this score of intrigue. A cue just right for your film noir debut. Use with 'Film Noir 1' and 'Film Noir 2' for full effect.https://www.smartsound.com/filmscore/images/fcrb07_200.jpgSingle57806-ST$ 39.9557806-EX$ 69.9557806-W$ 149.95Keywords: Brooding, Suspenseful, Uncertain, Sneaky, Abstract Genre: Themes, Orchestral, Noir Production Types: Cinematic, Suspense, Background Instrument: Orchestra, Saxophone, Trumpet, Acoustic, Instrumental
Film Noir 3 from the album Richard Band Vol 7 - Scoring Suites
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